Factorio Forums

1. What did you do?
I was creating a Coal liquefaction build.

2. What happened?
I encountered problems with the Heavy Oil ratios, after 1h of double checking my excel sheet I decided to further test in game.
After testing the outputs I found that the 30% productivity works for Petroleum and for Light Oil, but not for Heavy Oil.

3. What did you expect to happen instead? It might be obvious to you, but do it anyway!
I expected the "additional productivity cycles" to be 100% "for free".

After 10 cycles + 3 "free" due to productivity modules I expected to have:
Petroleum: 13*10 = 130
Light Oil: 13*20 = 260
Heavy Oil: 13*90 = 1170

What I received after 13 cycles:
Petroleum: ~130
Light Oil: ~260
Heavy Oil: 1095

Note:
The Heavy Oil input was not connected to the Heavy Oil output (see screenshot).
The 1095 may be the result of (10*90)+(3*(90-25))=1095 -> which means that the 3 productivity cycles keep 25 Heavy Oil each cycle as a ingredient.
As of now the Liquefaction productivity for Light Oil and Petroleum seems to be 30% and for Heavy Oil it's 21.667%.

I've also tested in bigger scales, a 25k Heavy Oil tank (input) results in 26k Light Oil, 13k Petroleum and about 110k heavy Oil (instead of 117k).
I also tested the Input for Steam and Coal. Steam used for those 1300 cycles was 50k (1000*50) and coal was 10k (1000*10), so the only "ingedient" for "free" productivity cycles seems to be Heavy Oil.

Not a bug. 25 units of heavy oil is considered to be a catalyst so you only get 65 heavy oil for free per productivity cycle. 69934

This is not a bug. The productivity bonus only apllies to the net produced amount, which in this case, means the output heavy oil minus the input heavy oil.

It used to work the way you described, but that was insanely broken, particular with the kovarex enrichment process. (40 to 41 u235 and you would get a 40% prod bonus on the full 41.)

Thanks for the replies, last time I did calculate coal liquefaction was in 0.16 if I remember correctly, either I failed to encounter this issue that time or it has been changed since. The 21.6667% (90-25) ratio is fixed in my excel sheets now and I can go on. Thanks!